#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
int main()
{
	char arr1[20] = "aca";
	char arr[20] = "aca";
	//strncpy(arr, arr1, 7);
	//strncat(arr1, arr, 3);
	
	int r = strncmp(arr1, arr,3);
	printf("%d", r);
	return 0;
}